TM 1-1520-238-23
7-302
7.74.
UTILITY HYDRAULIC MANIFOLD RESERVOIR SEAL REPLACEMENT (AVIM) – continued
7.74.7. Testing
a. Remove plug (18) from drain port (19).
(1) Remove lockwire from plug (18).
(2) Remove and discard packing (20).
b. Install MS21902J4 union with MS28775-4
packing on drain port (19).
(1) Lubricate MS28775-4 packing. Use hydraulic
fluid (item 92, App F).
c. Remove check valve (21) from valve port (22).
(1) Removed and discard packing (23).
d. Install HS4508-4C4 union with MS28775-4
packing on valve port (22).
(1) Lubricate MS28775-4 packing. Use
petrolatum (item 138, App F).
e. Cap all other ports.
f. Service manifold (2) with hydraulic fluid
through drain port (19) until indicator (24) is in
normal (green) operating area. Use clean
hydraulic fluid (item 92, App F).
g. Connect shop air, regulated to 25 psi, to man-
ifold (2) through valve port (22).
(1) Hold pressure 5 minutes and check for leaks.
No leakage allowed. Fluid too small to form a
drop is allowable. Manifold is leaking if drop is
formed.
(2) Remove air pressure.
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M04-3061-9
19
20
18
NORMAL
OPERATING
M04-3061-17
23
21
24
22
2
